The mad cow disease gave all the ranchers a terrible scare. There were a bunch of crazy cows that had a lot of problems, and then they found out that the mad cow disease could be passed on to humans. Uh-oh. Don't let this happen. When you see a mad cow pop up in the herd, you have to click on it to get rid of it. One mad cow may spoil the bunch so you better hurry. The mad cows are fast so you have to keep your eyes open and you have to be quick with the click. See how many mad cows you can rustle up before the timer runs out.